Superior in fracture toughness

Superior in fracture toughness

Unique material properties for maximum safety
NANOZR is a complex structure zirconium oxide/aluminium oxide reinforced with nanocrystals, the physical properties ofwhich are unique. It is much more resilient than comparable dental ceramics. The very high fracture toughness offers theutmost degree of safety. Furthermore, NANOZR is bio-compatible, resistant to aging. It is ideally suitable for crowns andbridges application as well as for telescope structures and superstructures.

The Microstructure

Impact resistance

By integrating Ce-TZP and Al2O3 crystals on a scale of a few
nanometers (one billionth of a meter) in grains of the othercomponent, the fracture toughness is increased more than
twice as much as that of yttria type zirconia.

Steel balls, weighing 7 grams to 508 grams, were dropped
from a height of 60 centimeters onto 1 mm thick discs madeof each kind of Zirconia (SHT, HT, T, and NANOZR) which werecentered on a steel plate.
The impact force at breakage of NANOZR was 1740N, and theimpact resistance was approximately 2 to 15 times or morethat of yttria type zirconia.

Nano-sized
Al2O3 crystal

Ce-TZP grain

508 g

2000

Al2O3grain

SEM image of NANOZR

Nano-sized
Ce-TZP crystal

Image of NANOZRFracture Toughness（MPa・m1/2）

1600
1400
1200
175 g

1000
800
600
40065 g
33 g

200

Fracture toughness

0SHT

HT

T

NANOZR

Impact resistance of each kind of zirconia

14121086420

Impact force at break (N)

1800

SHTHT

T

NANOZR

Fracture Toughness of Each Kind of Zirconia( ISO 15732: 2003 (SEPB Method) Tested by JAPAN FINE CERAMICS CENTER )Lineup
NANOZR

ColorDiameter(Φ) 98.3mm

WhiteThickness ( t )10mm 12mm 14mm 16mm 18mm 20mm 22mm 25mm 30mm 35mm
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Sintering Schedule<KZR-CAD NANOZR Sintering Program>
A Sintering Program

In the case of 1 ~ 7 unit bridge, sintered by inFire HTC(Sirona)

Heat Rate

Heat Rate

HoldCoolingTemperature (˚C)

850

1,450

1,450

1,000

Condition

3 (˚C/min)10 (˚C/min)

120 min

8 (˚C/min)

B Sintering Program

In the case of 8 unit bridge or more or a whole disc, sintered by inFire HTC(Sirona)

Heat Rate

Heat Rate

HoldCoolingTemperature (˚C)

850

1,450

1,450

300(in the furnace)

Condition

3 (˚C/min)

3 (˚C/min)

120 min3 (˚C/min)【Precaution】* Sinter with one tray.
* Do not use Sintering Pin in any cases.
* In the case of 1-7 unit bridge, remove from support pins and follow Asintering program on beads.
* However, in the case of sitering a whole disc without removing fromsupport pins, follow B sintering program.

* Or 1-7 unit bridge removed from support pins with a disc can besintered by B sintering program.
* In the case of 8 unit bridge or longer span or denture floor should besintered with a whole disc without removing.
* Do not touch a tray until the temperature indicator shows under 100 ˚C.

Manufacturer

1090-3 Otani, Kamibun, Kagami-cho,
Konan-shi, Kochi, 781-5451 Japan

https://www.yamakin-global.com

Head Office: 3-7 Sanadayama-cho Tennoji-ku Osaka 543-0015, Japan
Branch Office: Tokyo, Osaka, Sendai, Nagoya, Fukuoka, JAPAN
Factory and R&D: Kochi, JAPAN
P: +81-887-55-0281 F: +81-887-55-0053
E: contact@yamakin-gold.co.jp

INTERNATIONAL20200513